System of heating.



No. 725,717. PATENTED APR. 21, 1903. G. H ENNINGS.

SYSTEM OF HEATING. APPLICATION FILED r23. 14, 1901.

170 MODEL. v

m'fiz 66176.5.

- In vwzzai'.

UNITED STATES I PATENT OFFICE.

GEORGE H. J ENNINGS,OF BROCKTON, MASSACHUSETTS.

SYSTEM OF HEATING.

SPECIFICATION forming part of Letters Patent No. 725,717, dated April 21, 1903. Application filed February 14,1901. Serial N0.4'7,343. (N0 model.)

To all whom it may concern: 7

Be it known that I, GEORGE H. JENNINGS, a citizen of the United States, residing in Brockton, in the county of Plymouth and;

State of Massachusetts, have invented an Improvement in Systems ofHeating, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to a system for heating by means of live or exhaust steam, which is particularly adapted for use in factories, mills, and likeplaces.

The invention has for its objectto provide a system with which a maximum heating effect may be obtained at a minimum cost. For this purpose I employ a circuit having its return for water of condensation connected with a pressure-pump, and with said return is connected the cold-water-supply pipe, which is preferably provided with a spraying device,the cold water admixing with the p'arm water of condensation creating a vacuum in the return side of the system, the amount of the vacuum varying with the amount of circulation and the temperature of the building being heated. The temperature of the cold water is raised by the heat in the water of condensation, and its temperature may be raised still further by causing it to pass through a feed-water heater before entering the boiler. The feed-water heater may be of any suitable construction and is heated by the exhaust-steam from the engine. The pump is provided on its discharge side with a vent-pipe communicating with the atmosphere and through which pipe any air in the system may be discharged into the atmosphere. The supplyside of the system may be connected with the exhaust or with the boiler and preferably with both, whereby exhaust or live steam may be used in the heating system. These and other features of this invention will be pointed out in the claims at the end of this specification.

The drawing is a diagrammatic view of a heating system embodying this invention.

Referring to the drawing, a represents a steam-boiler; b, an engine which is supplied with steam from the'boiler a through the pipe c,the exhaust from the engine passing through a pipe 01 to a cylinder or casing e, forming a feed-water heater. The heater e has an outlet-pipe f, which may communicate with the atmosphere, and the outlet-pipe f has connected to it the supply side of the heating system-namely, the pipe g-which extends around the building or other structure to the various rooms to be heated, where it is suitably connected with heaters h, which are shown as radiators, but which heaters may be of any desired form .or construction. In the present instance I have shown three radiators h, which may be located in the same or different rooms of the building, each radiator having its inlet-pipej connected to the main s11 pply-pipe g and provided with a shutoff or valve 70. The outlet-pipes l of the radiators are connected to a common return-pipe m,'which may and preferably will be provided with an enlargement or coupling n, with which the outlet-pipes for the radiators are connected. The return-pipe m is connected with the water-inlet port of a pressure-pump 0 of any usual or suitable construction, having its water outlet or discharge-port connected by a pipe 19 with a coil q within the heater e, the said coil being connected by the pipe r with the boiler a. The return-pipe m in accordance with this invention has connected to it the cold-water-supply pipe 8 for the boiler, and the saidcold-water-supply pipe may and preferably will be connected with the coupling or enlargement n, which may be designated the condenser. The pipe 3 may and preferably will be provided with a valve to and with a nozzle or spraying device 25 of any suitable construction, which is indicated by dotted lines in the drawing and by which the cold water is distributed and more thoroughly commingled with the steam and water of condensation in the return-pipe. The cold water condenses the steam and forms a vacuum on the return side of the heating system, which facilitates the circulation of the steam through the radiators or heaters h, and at the same time the temperature of the cold water is raised. The pressure pump draws the Water of condensation through the return-main m and forces it through the feedwater heater back into the boiler. The water on its passage through the feed-water heater has its temperature still further raised m into limit, my 'mve formso con BHSQYS may pl'ed to the water sup ner.

ipe g is con shown,

nix-off turn-pipe intermediate of said heater and pressure-pump, and a boiler, a feed-water heater connected with said boiler and with the outlet-port of said pressure-pump, and a vent-pipe connected to the discharge side of said pressure-pump, substantially as described.

5. In a system of the class described, the combination with a steam-supply pipe, of a plurality of heaters connected therewith and provided with outlet-pipes, of a condenser into which the said outletpipes discharge, a cold-'Water-supply pipe communicating with said condenser, a common return-pipe connected with-said condenser, a pressure-pump with which said return-pipe is connected, a boiler with which said pressure-pump is connected, a vent-pipe communicating with the discharge side of said pump, and a valve in said vent-pipe, substantially as described.

6. In a system of the class described, in combination, a boiler, a steam-supply pipe communicating therewith, a plurality of heaters connected with said supply-pipe and provided with outlet-pipes, a condenser into which the said outlet-pipes separately discharge, a cold-water-supply pipe connected with said condenser and provided with a spraying device, a return-pipe connected with the bottom of said condenser, a feed-water or pressure pump with which the said returnpipe is connected, an outlet-pipe for said pump connected with the said boiler, and a vent-pipe communicating with the discharge side of the pump, substantially as described.

7. In a system of the class described, the combination with a. steam-generator, radiators supplied therefrom, a return-pipe in free communication with said radiators, said return-pipe being closed to the atmosphere and provided with a condensing means, a pump having its inlet in communication with said return-pipe, a pipe providing communication between the discharge-port of said pump and the steam-generator, and an air-vent located on the discharge side of said pump, substantially as described.

8. In a system of the class described, the combination with a boiler, of a heater connected therewith for the passage of steam through it,,a pressure-pump, a return-pipe for the heater connected with the inlet-port of said pressure-pump, means for connecting the discharge-port of the said pressure-pump with said boiler, and a pipe connected with the discharge side of the pressure-pump and communicating with the atmosphere, to discharge the air accumulated in said pump into the atmosphere, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEORGE H. JENNINGS- Witnesses: t

J AS.,H. CHURCHILL, ROBERT CLIFFORD. 

